The main differences between precision casting and ordinary casting are reflected in dimensional accuracy, surface finish, subsequent processing requirements and scope of application. The following is a specific comparison:
Summary of core differences
Precision and surface quality:
The dimensional tolerance of precision casting castings can reach ±0.2 mm, and the surface roughness is lower (such as Ra 3.2-1.6μm), which is close to the final finished product shape and usually does not require secondary processing.
Ordinary casting has large dimensional tolerances and high surface roughness, and often requires subsequent machining before use.
Subsequent processing requirements:
Precision casting can achieve “near net shape”, reduce or even eliminate cutting processes, and save materials and costs.
Ordinary casting castings usually require a lot of machining to remove excess, and the material utilization rate is low.
Applicable parts features:
Precision casting can produce complex structures, thin-walled parts and fine textures (such as directly casting trademarks).
Ordinary casting is mostly used for thick-walled parts with simple structures and low precision requirements.
Process cost and efficiency:
Precision casting molds have high costs, but the unit cost is low in mass production and the scrap rate is lower.
General casting (such as sand molds) has low initial costs, but high scrap rates, and subsequent processing increases the total cost.
Application areas:
Precision casting is widely used in high-precision demand fields such as aerospace, automotive key components, and high-end equipment.
General casting is more common in general mechanical parts or large castings with low performance requirements.
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Here is our Custom metal Castings Display：
